BANGKOK (AP) — Anti-government demonstrators swarmed dozens of polling stations in Thailand on Sunday to stop advance voting for next week’s general elections, chaining gates shut, threatening voters and preventing hundreds of thousands of people from casting ballots.

A protest faction leader was fatally shot in a confrontation near a voting center that also left 11 people wounded, the city’s emergency services said, and isolated street brawls broke out in several parts of Bangkok.